Analytics Vasiliki (Vasia) Kalavri
 vkalavri@bu.edu Spring 2020 1/28: Stream ingestion and pub/sub systems Streaming sources Files, e.g. transaction logs Sockets IoT devices and sensors Databases notify unsubscribe advertise(): information reg. future events Publish/Subscribe Systems 17 Pub/Sub levels of de-coupling • Space: interacting parties do not need to know each other • Publishers do Message-passing RPC/RMI Asynchronous RPC Futures Message Queues Pub/Sub Yes Yes Yes Can you fill this in? 19 Pub/Sub vs. other paradigms Paradigm Space Decoupling Time Decoupling Synchronization

INSC_9_when_all6senderIXtlS4_tlS7_tlS8_Lc119ELc104ELc101ELc110ELc95ELc9 7ELc108ELc108EEEEEJNS16_10sub_senderINSW_IXtlNS3_ILm8EEEtlNS6_IcLm8EEEtlA8_cLc106ELc117ELc115EL c116ELc45ELc97ELc48EEEEESF_JiEEE [9]{(char)119, (char)104, (char)101, (char)110, (char)95, (char)97, (char)108, (char)108}}}, async::_when_all::sub_sender{std::__1::array{char [8]{(char)106 (char)115, (char)116, (char)45, (char)97, (char)48}}}, async::set_value_t, int>, 0ul>, async::_when_all::sub_sender{std::__1::array{char [8]{(char)106

"usecase/" #aliceblue;line:blue;line.dotted;text:blue @enduml 8.14.2 Nested element 8.14.3 Without sub-element @startuml artifact artifact #aliceblue;line:blue;line.dotted;text:blue { } card card #ali dotted;text:blue { } storage storage #aliceblue;line:blue;line.dotted;text:blue { } @enduml 8.14.4 With sub-element @startuml artifact artifactVeryLOOOOOOOOOOOOOOOOOOOg as "artifact" #aliceblue;line:blue;line **test list 1** * Bullet list * Second item ** Sub item *** Sub sub item * Third item ---- **test list 2** # Numbered list # Second item ## Sub item ## Another sub item # Third item }| {^Mix on salt ==Just

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289 21.2. Development help sub-subject . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . necessary to understand its main parts and the purpose that each part plays. Thus the main parts or sub-systems are summarized below. 1.2.1. Web MVC Framework The lowest or most foundational part of Apache warehouse, a store with related inventory. How do I create a facility? 1. Select the 'Facility' sub menu and the screen will be displayed 2. Enter the 'Facility Id' field (NOTE: If you do not enter

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292 21.2. Development help sub-subject . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . necessary to understand its main parts and the purpose that each part plays. Thus the main parts or sub-systems are summarized below. 1.2.1. Web MVC Framework The lowest or most foundational part of Apache warehouse, a store with related inventory. How do I create a facility? 1. Select the 'Facility' sub menu and the screen will be displayed 2. Enter the 'Facility Id' field (NOTE: If you do not enter

"usecase/" #aliceblue;line:blue;line.dotted;text:blue @enduml 8.14.2 Nested element 8.14.3 Without sub-element @startuml artifact artifact #aliceblue;line:blue;line.dotted;text:blue { } card card #ali dotted;text:blue { } storage storage #aliceblue;line:blue;line.dotted;text:blue { } @enduml 8.14.4 With sub-element @startuml artifact artifactVeryLOOOOOOOOOOOOOOOOOOOg as "artifact" #aliceblue;line:blue;line can also be composite. You have to define it using the state keywords and brackets. 9.3.1 Internal sub-state @startuml scale 350 width [*] --> NotShooting state NotShooting { [*] --> Idle Idle --> Configuring

"usecase/" #aliceblue;line:blue;line.dotted;text:blue @enduml 8.14.2 Nested element 8.14.3 Without sub-element @startuml artifact artifact #aliceblue;line:blue;line.dotted;text:blue { } card card #ali dotted;text:blue { } storage storage #aliceblue;line:blue;line.dotted;text:blue { } @enduml 8.14.4 With sub-element @startuml artifact artifactVeryLOOOOOOOOOOOOOOOOOOOg as "artifact" #aliceblue;line:blue;line **test list 1** * Bullet list * Second item ** Sub item *** Sub sub item * Third item ---- **test list 2** # Numbered list # Second item ## Sub item ## Another sub item # Third item }| {^Mix on salt ==Just

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223 22.2. Development help sub-subject . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . necessary to understand its main parts and the purpose that each part plays. Thus the main parts or sub-systems are summarized below. 1.2.1. Web MVC Framework The lowest or most foundational part of Apache warehouse, a store with related inventory. How do I create a facility? 1. Select the 'Facility' sub menu and the screen will be displayed 2. Enter the 'Facility Id' field (NOTE: If you do not enter

"usecase/" #aliceblue;line:blue;line.dotted;text:blue @enduml 8.14.2 Nested element 8.14.3 Without sub-element @startuml artifact artifact #aliceblue;line:blue;line.dotted;text:blue { } card card #ali dotted;text:blue { } storage storage #aliceblue;line:blue;line.dotted;text:blue { } @enduml 8.14.4 With sub-element @startuml artifact artifactVeryLOOOOOOOOOOOOOOOOOOOg as "artifact" #aliceblue;line:blue;line Lenguaje PlantUML (1.2023.11) 200 / 530 9.3 Estados compuestos 9 DIAGRAMA DE ESTADO 9.3.1 Sub-estado a sub-estado @startuml state A { state X { } state Y { } } state B { state Z { } } X --> Z Z -->

"usecase/" #aliceblue;line:blue;line.dotted;text:blue @enduml 8.14.2 Nested element 8.14.3 Without sub-element @startuml artifact artifact #aliceblue;line:blue;line.dotted;text:blue { } card card #ali dotted;text:blue { } storage storage #aliceblue;line:blue;line.dotted;text:blue { } @enduml 8.14.4 With sub-element @startuml artifact artifactVeryLOOOOOOOOOOOOOOOOOOOg as "artifact" #aliceblue;line:blue;line **test list 1** * Bullet list * Second item ** Sub item *** Sub sub item * Third item ---- **test list 2** # Numbered list # Second item ## Sub item ## Another sub item # Third item }| {^Mix on salt ==Just